Keyboard support assembly



FIG. 1 is a top, front, right isometric view of a keyboard support assembly showing our new design;

FIG. 2 is a top view of the keyboard support assembly;

FIG. 3 is a bottom view of the keyboard support assembly;

FIG. 4 is a front view of the keyboard support assembly;

FIG. 5 is a rear view of the keyboard support assembly;

FIG. 6 is a right side elevational view of the keyboard support assembly; and,

FIG. 7 is a left side elevational view of the keyboard support assembly. 

The ornamental design for a keyboard support assembly, as shown. 